Quick Answer
To communicate distress signals in rough seas, use mirrors or shiny objects to reflect sunlight towards passing aircraft, and set off flares or pyrotechnic devices at dawn, noon, and dusk. In a life raft, activate the EPIRB (Emergency Position-Indicating Radio Beacon) and use the VHF radio to send distress calls.
Visual Distress Signals
Use mirrors or shiny objects to reflect sunlight towards passing aircraft. Aim for the sun’s position at dawn, noon, and dusk when aircraft are most likely to be flying in the area. Hold the mirror at an angle to create a flashing effect, which is more likely to be seen. A shiny object such as a piece of metal or a glass bottle can also be used. If you have a life raft, inflate the bright orange flag and attach it to the raft.
Radio Distress Calls and EPIRB Activation
Activate the EPIRB (Emergency Position-Indicating Radio Beacon) as soon as possible after the emergency. This device sends a distress signal to emergency responders via satellite, giving them your location. Use the VHF radio to send distress calls on Channel 16, the international distress frequency. Use a clear and concise message, such as “Mayday, this is [your name] on [your location]”. Repeat the message at regular intervals to increase the chances of being heard.
Pyrotechnic Signals
Set off flares or pyrotechnic devices at dawn, noon, and dusk to signal your location to passing aircraft. Use red flares to signal distress, and green flares to signal to friendly vessels. Follow the manufacturer’s instructions for the number of flares to set off and the safe distance to maintain. Be aware of the wind direction and any potential hazards in the area before setting off the flares.
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